How to Grow Calendula
'Art Shades Mixed' from Seed
The refined pot marigold — large frilled blooms in warm apricot, creamy citrus, soft orange and buff with mahogany-dipped petals on tall 60cm cutting stems, flowering for months, edible, and effortlessly self-seeding
The standard pot marigold is a cheerful, uncomplicated orange — a bright, simple colour that has brightened British cottage gardens for centuries. 'Art Shades Mixed' is the pot marigold for gardeners who want something more nuanced: the same effortless vigour and generosity, the same long season from early summer to the first frosts, the same ease of growing from direct-sown seed — but with a colour palette that sits firmly in the warm, sophisticated end of the spectrum. Apricot, creamy citrus, soft orange, buff and warm coral, many of the flowers with individual petals tipped or backed in mahogany that adds depth and complexity to each bloom.
At 60cm, it is noticeably taller than many calendula varieties and was bred specifically for cutting garden use — the longer stems make it genuinely useful in arrangements where shorter varieties would require support. The large, frilled, semi-double and double flowers with their layered petals photograph beautifully and hold well in the vase for seven to ten days when properly conditioned. As with all calendulas, the petals are fully edible — mild and slightly peppery, used as a colourful garnish for salads, cakes and savoury dishes, and historically used across Europe as a saffron substitute for colouring rice and stews.
Quick Facts at a Glance
Plant Type
Hardy Annual
Sowing Time
Sep (preferred) · Mar–May direct
Flowering Months
May/Jun – October
Position
Full sun to partial shade
Height & Spread
50–60cm · 20–25cm
Difficulty Rating
1 out of 5 — Very Easy
Understanding the Plant
Calendula officinalis — the pot marigold — has been cultivated in British and European gardens since at least the twelfth century, making it one of the oldest continuously-grown garden plants. Its name derives from the Latin calendae — the first day of each month in the Roman calendar — reflecting the observation that calendula flowers on or near the first day of most months of the year in mild climates. This remarkable flowering persistence is one of its most valuable characteristics: given regular deadheading, 'Art Shades Mixed' will continue producing blooms from early summer until the first hard autumn frosts with barely a pause.
It is an extraordinarily unfussy plant. It germinates reliably in temperatures as low as 5°C, tolerates drought, poor soil and imperfect drainage, grows in full sun or moderate partial shade, and is essentially impervious to most garden pests other than slugs on very young seedlings. Its reputation as the ideal beginners' flower is entirely justified — few plants reward so generously for so little effort. But 'Art Shades Mixed', with its refined palette of apricots, creams and mahogany, also rewards the experienced gardener who appreciates what these quieter, more sophisticated colours do in a mixed cottage garden arrangement.
What Makes Art Shades Different
Standard pot marigold varieties produce flowers in a fairly narrow range of bright orange and golden-yellow — vivid and cheerful but limited in palette flexibility. 'Art Shades Mixed' was bred specifically to extend the colour range into softer, warmer, more complex tones: apricot, creamy citrus, pale orange, warm buff, with many flowers showing the mahogany backing or tipping that adds depth and a painterly quality to each bloom. The name reflects this — the colours are those of an artist's warm palette rather than the simple primary orange of a standard marigold. This makes 'Art Shades' far more versatile in mixed arrangements: the apricot tones work with blues, purples and whites where vivid orange would clash.
Edible Petals — The Saffron Substitute
Calendula petals are 100% edible and have been used in cooking for centuries. The flavour is mild and slightly peppery — unobtrusive enough to use generously as a garnish. Historically, the petals were dried and powdered as a saffron substitute (giving a similar warm yellow colour to rice and stews though without the flavour). The warm apricot and orange tones of 'Art Shades' are particularly beautiful scattered over a summer salad or used to decorate a Victoria sponge, and they can be crystallised in egg white and sugar for long-lasting edible decorations.
When & How to Sow
Calendula is among the easiest seeds to sow — large, curved seeds that are easy to handle individually, rapid and reliable germination, and a wide temperature range for sprouting. Direct sowing outdoors is the standard and preferred approach; indoor sowing is possible but rarely necessary for this cold-tolerant hardy annual.
Autumn Sowing for Earlier and Larger Flowers
Sowing calendula directly outdoors in September produces plants that establish strongly over autumn and winter as small rosettes, survive mild UK winters in most locations, and come into flower from May — a full month or more earlier than spring-sown plants. Autumn-sown plants also tend to be more robust and more productive than spring-sown ones. If only one sowing window is possible, September is the one to choose.
-
Direct sow where plants are to flower — no indoor propagation needed. Prepare a rough seedbed. Calendula is not fussy about soil quality — it germinates in poor, average and moderately rich soil alike. Full sun is preferred but partial shade is accepted. Rake to a reasonable tilth.
-
Sow seeds at approximately 1cm depth. The large, curved calendula seeds are easy to place individually into drills, spacing them at 5–7cm and thinning to 30cm once established. Alternatively, scatter thinly and thin to 30cm. Water gently. Germination occurs in 7–10 days, often faster.
-
Thin to 30cm apart once seedlings are established. Crowded plants flower less freely and are more susceptible to mildew. 30cm gives adequate airflow and allows the branching habit of 'Art Shades' to develop fully. Use thinnings as transplants elsewhere while roots are small.
-
Deadhead religiously — this is the single most important care step. Remove spent flowerheads as soon as petals begin to fade. The sticky seed heads that form after flowering signal to the plant that its reproductive task is complete, and flowering slows dramatically if seed heads are left in place. Remove every fading head promptly and the plant will continue flowering well into October.
Growing On Tips
Sun or Partial Shade
Full sun produces the richest, warmest colour and the most prolific flowering. 'Art Shades Mixed' is genuinely tolerant of partial shade — up to four hours of direct sun per day — without significant loss of performance, which makes it more versatile than many cutting garden annuals. In deeper shade, flowering is reduced and stems become drawn.
Deadhead Every Visit
The key to a long season with calendula is consistent, frequent deadheading. Remove every spent flowerhead before seed sets — cut back to the nearest side shoot or bud. A single plant that is deadheaded consistently can produce dozens of stems across a season. Left undeadheaded, the same plant flowers for a few weeks and then primarily focuses on seed production.
Drought Tolerant
Established calendula tolerates considerable drought without stress. Water young seedlings for the first two to three weeks. Once established, reduce watering — calendula in moderately dry conditions is often healthier than in over-watered ground, which encourages mildew. In containers, water more regularly but ensure good drainage.
Self-Seeding
Allow a few flowerheads to fully ripen and shed seed at the end of the season and 'Art Shades Mixed' will return the following year with minimal effort. Self-seeded plants germinate in autumn and flower earlier than spring-sown plants the following year. The self-seeded colours may vary slightly from the parent mix but remain within the warm apricot-to-orange range.
Harvesting Edible Petals
Pick individual petals or whole flowerheads from fully-open flowers. Petals can be used fresh as a garnish — they hold their colour for several hours after picking. For dried petals, harvest fully-open flowers and lay on paper in a warm, dry place for one to two weeks. Dried petals retain their colour well and can be stored in a sealed jar for months.
Powdery Mildew
Powdery mildew — a white, powdery coating on the leaves — is the main disease problem for calendula, most common in dry summers and in late season. Improve airflow through correct spacing (30cm). Remove affected leaves promptly. Some mildew in late summer is natural and rarely significantly affects flowering. Keeping plants well-watered at the roots (not overhead) reduces incidence.
Common Problems & How to Fix Them
| Problem | Likely Cause | What to Do |
|---|---|---|
| Flowering stops or slows | Deadheading neglected | Remove all spent flowerheads immediately. Even a week of neglect allows seed heads to develop and signals to the plant to slow flower production. Resume deadheading consistently and flowering should recommence within one to two weeks. |
| Powdery mildew on leaves | Poor airflow, dry conditions, late season | Ensure 30cm plant spacing. Water at the base, not overhead. Remove affected leaves promptly. Some mildew in late summer is normal and acceptable — the flowers are unaffected and the season is nearing its natural end. Succession sowing ensures fresh, clean plants throughout the season. |
| Slugs on seedlings | Common problem in damp conditions | Protect young seedlings with organic slug pellets or copper tape for the first two to three weeks after germination. Once plants have three or four true leaves and stems are strengthening, slug damage becomes less significant. Autumn-sown plants that overwinter as small rosettes may need protection through winter in wet gardens. |
| Leggy, floppy stems | Insufficient sun, overcrowding, or very rich soil | Ensure adequate sun (at least four hours direct). Space to 30cm — crowded plants produce drawn stems reaching for light. Avoid very rich, heavily-manured soil, which produces leafy growth at the expense of flowers. 'Art Shades' at 60cm is taller than many calendulas and may benefit from pea-sticks in exposed positions. |
When to Expect Flowers
From a September direct sowing, 'Art Shades Mixed' typically comes into flower in May — some plants even in April in mild years. From a March or April spring sowing, flowers from June. The season runs with consistent deadheading right through to the first hard frosts of October or November, providing four to five months of cutting material from a single sowing. For an even longer season, sow in both September and March, with the autumn planting providing May to September flowers and the spring sowing extending into November as older autumn plants begin to decline.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 🍂 Autumn Sow |
|
|
||||||||||
| 🌿 Spring Sow |
|
|
|
|||||||||
| 🌸 Flowering |
|
|
|
|
|
|
Plant Specifications
The refined pot marigold for the cutting garden and the kitchen
'Art Shades Mixed' is the pot marigold that earns its place on both counts — the apricot-and-mahogany palette is sophisticated enough for the most considered cutting garden arrangement, and the edible petals bring a genuine culinary dimension that most ornamentals cannot offer. Sow in September for May flowers, deadhead consistently, allow some plants to self-seed for the following year, and discover why this ancient cottage garden annual has remained on gardeners' essential lists for centuries. Scatter the petals on a summer salad. Watch the bees work through the open flowers on a warm afternoon. Cut armfuls for the house. This is gardening at its most uncomplicated and most rewarding.
Shop Calendula Art Shades Mixed Seeds →